4XJ9
Crystal structure of the NanB sialidase from streptococcus pneumoniae in complex with Optactin at pH 5.0 in 50mM Sodium Acetate with DMSO as the cryoprotectant
Functional Information from GO Data
| Chain | GOid | namespace | contents |
| A | 0004308 | molecular_function | exo-alpha-sialidase activity |
| A | 0005737 | cellular_component | cytoplasm |
| A | 0005975 | biological_process | carbohydrate metabolic process |
| A | 0006689 | biological_process | ganglioside catabolic process |
| A | 0009313 | biological_process | oligosaccharide catabolic process |
| A | 0016020 | cellular_component | membrane |
| A | 0016798 | molecular_function | hydrolase activity, acting on glycosyl bonds |
| A | 0043231 | cellular_component | intracellular membrane-bounded organelle |
| A | 0052794 | molecular_function | exo-alpha-(2->3)-sialidase activity |
| A | 0052795 | molecular_function | exo-alpha-(2->6)-sialidase activity |
| A | 0052796 | molecular_function | exo-alpha-(2->8)-sialidase activity |
Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 13 |
| Details | binding site for residue OPX A 701 |
| Chain | Residue |
| A | TYR250 |
| A | HOH937 |
| A | HOH940 |
| A | HOH901 |
| A | HOH1140 |
| A | THR251 |
| A | GLN494 |
| A | LYS499 |
| A | ILE596 |
| A | THR657 |
| A | GLU658 |
| A | HOH982 |
| A | HOH919 |
| site_id | AC2 |
| Number of Residues | 7 |
| Details | binding site for residue DMS A 702 |
| Chain | Residue |
| A | ARG245 |
| A | ILE246 |
| A | ARG264 |
| A | ASP270 |
| A | ILE326 |
| A | ASP327 |
| A | TYR653 |
| site_id | AC3 |
| Number of Residues | 4 |
| Details | binding site for residue DMS A 703 |
| Chain | Residue |
| A | ARG129 |
| A | GLU165 |
| A | VAL166 |
| A | SER682 |
Functional Information from SwissProt/UniProt
| site_id | SWS_FT_FI1 |
| Number of Residues | 1 |
| Details | ACT_SITE: Proton acceptor => ECO:0000250 |
| Chain | Residue | Details |
| A | ASP270 |
| site_id | SWS_FT_FI2 |
| Number of Residues | 1 |
| Details | ACT_SITE: ACT_SITE => ECO:0000255 |
| Chain | Residue | Details |
| A | GLU541 |
| site_id | SWS_FT_FI3 |
| Number of Residues | 1 |
| Details | ACT_SITE: Nucleophile => ECO:0000250 |
| Chain | Residue | Details |
| A | TYR653 |
| site_id | SWS_FT_FI4 |
| Number of Residues | 3 |
| Details | BINDING: BINDING => ECO:0000250 |
| Chain | Residue | Details |
| A | ARG245 | |
| A | ARG557 | |
| A | ARG619 |
